Tail-gate-operating mechanism for dump-trucks



CARLSUN. TAIL GATE OPERATING MECHANISM FOR DUMP TRUCKS.

' APPLICATION FILED .IULY 23,1919.

1,332,424. Patented Mar. 2, 1 920.

3 SHEETSSHEET I.

' Swvawto;

lqhilzkv Cozflaan P. CARLSON.

TAIL GATE OPERATING MECHANISM FOR DUMP TRUCKS.

APPLICATION FILED JULY 23, 19:9.

1 ,{;32,- 1;24. Patented Mar. 2, 1920.

3 SHEETS-SHEET 2.

if Z6 Mme/1 4 P. CARLSUN.

TAIL GATE OPERATING MECHANISM FOR DUMP TRUCKS.

APPLICATION FILED JULY 23,1919.

1,33Q,42% Patented Mar. 2, 1920.

3 SHEETSSHEET 3.

innca WOW/A Q43 1 PHILIP CARLSON, 0F BRIDGEPOBT, CONNECTICUT.

TAIL-GATE-OPERATING mncnemsm non noun-ravens.

To all whom it may concern:

Be it known that I, Pntrmr (lemon, a citizen of the United States, and resident of Bridgeport, inthe county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Tail-Gate- Operating Mechanism for Dump-Trucks, of

which the following is a specification.

My invention relates to new and useful improvements in delivery wagons or trucks and more especially to mechanism for operatin the tail gate of bodies of motor dump true s, so-called.

The object of the invention is to provide an improved mechanism for operating the tail gate of dump truck bodies and whereby the gate may be swung open either from the top or bottom, and so that the gate will be automatically opened at the bottom when swinging from the top and when the body is tilted for dumping, and so that it will likewise automatically close and be locked shut, when the load has been dumped and the body lowered to its normal position, and further to provide means whereby the said tail gate may be hinged to the bottom and dropped outward in alinement with the floor of the body, to form an extension when the body is used as a platform body for the movin of furniture and the like.

Witid these and other objects in view the invention resides and consists in the construction and novel combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended, it being understood that various changes in the form, proportion, size and minor details of construction within the scope of the claims may be resorted to without departure from the spirit or sacrificing any of the advantages of the invention.

Similar characters of reference denote like 01' corresponding parts throughout the Specification of Letters Patent.

inserting the Patented Mar. 2,1920.

Application filed July 23, 1919. Serial No. 312,780.

tion of the body including the tail gate and the tail gate operating mechanism, the body being shown slightly tilted preparatory to dumping.

. Fig. 4 shows a further side View of a portion of the chassis frame, the body being in a tilted position and the tail gate released at the bottom and in an open hanging posi tion.

Fig. 5 is a further side view of a part of the chassis frame and the body, withside boards removed, and taiLgate lowered and supported by chains to form a platform extension, and I Fig. 6 shows on an enlarged scale the looking pin used to connect the upper parts of the tail gate to the arms hinged to the body standards.

Referring in detail to the characters of reference marked upon the drawings, 8 indicates the chassis'frame of a motor truck, 9 a hoisting apparatus supported thereon and connected with the body 10 through the medium of an arm 11, carried by the forward end of the body. .The rear end of the body, as shown, is pivotally supported at 12 uponthe brackets 13 secured to the rear end of the chassis frame, and is thus adapted to be swung upon its pivot when the forward end is raised and lowered by the hoisting apparatus referred to.

As constructed the body is shown as made up of a number of pieces so as to form either anopen platform body or a closed dumping body and in this connection it will be noted pins 17 shown in Fig. 6.

Upon the tail gate 18 is secured straps 19 whose upper ends are recessed to'recive the lower endsIof the hangers 15 an are also provided with square holes that register with the holes in the hangers and likewise to receive the pins 17 to rigidly secure the parts together. The inner ends of the pins 17 have a pawl 20 pivoted therebetween, and which is adapted to be held in alinement with the pin, as shown in dotted lines, when pin, but which drops to the crosswise position shown in full lines when the pin is inserted.

Each of the posts 14 are provided with a of the floor and are further provided with metal extensions 24to en formed between the ends 0 the posts 14 before mentioned.

Plates 26 having projected a e ockets 25 the braces and eyes are secured to the under side of the floor of the body and serve to form the fixed leaves of the bottom pair of hinges for the tail gate 18. The hinge straps 28 secured to the outside of the tail gate are provided with an eye 29 in their lower ends that registers with the eyes 27 of the plates on the under side of the body and are hingedly connected therewith by means of the pins 30 connected by a chain to the gate. These pins 30 are similar to the pins 17, in the square holes, connecting the gate straps 19 '15, except that they are round pins instead of square. They are also provided with pawls in'their end portion which-automaticall lock them in position.

rom the foregoing it will be seenthat if the bottom pins 30 are removed the tail gate will be free to swing upon the pivot 16 should the body be raised as when dumping a load, causing the gate to open at the bottom as shown in Figs. 3 and 4. On the other hand if the s uare pins 17 are removed from their sockets t e gate may be lowered to form a platform extension as indicated in Fig. 5.

A pair of chains 31 are provided'for supporting the tail gate in its lowered position as shown in Fig. 5 one end being connected to the osts 14 and the other to the outer portion of the tail gate so as to retain the same in an extended position substantially parallel with the floor of the body.

A rocker shaft 32 is journale in bearings 33 secured to the under side of the rear end portion of the body. and upon the central portion of this shaft I provide an arm 34 that is pivotedly connected to one end of a rod 35. The lower end of this rod is seated in a bracket 36 secured to the end of the chassis frame in a manner to cause the'rocker shaft to rock in its bearing when the rear end of the body is tilted down toward the end of the chassis frame. This rod is in part threaded and provided with a lock nut 37- so that it may be adjusted to insure the proper operation of the tail gate. A spring 42 one end of which is connected to the body and the other end to the arm 34, serves to yieldably retain the crooked arms 38 in position to engage Upon shaft I provide 'a tively speaking,

and support the tail gate. each of the outer ends of this rocker crooked arm 38 which rela are disposed upward and and the hanger end portion of each ofthese pawls is cut away to form a shoulder 40 as clearly appears in Figs. 3, 4 and 5 and which in practice serves to engage the ends of the lugs 41 secured to the two end portions of the tail gate, when the latter is being closed as indicated in Fig. 3, and so as to insure the final closing of the tail gate with the final lowering movement of the body. These pawls thus serve to retain the tail gate closed when the body is normally positioned upon the chassis frame and the gate hinged at the top for dumping, but is entirely disconnected, and not used when at the bottom and used as an extension platform, as indicated in Fi 5.

Having thus describe? my invention, what I claim and desire to secure by Letters Patent, is:

the tail gate is hinged 1. The combination with a vehicle body,

of a tail gate therefor, hinge connections of the body and gate whereby the latter may be swung open from either the top or bottom, arms pivoted to the body, pawls carried by the arms to engage the tail gate, connections between the truck frame and the arms whereby the latter are operated to engage and disengage the tail gate by the tiltmg of the body.

2. The combination with a vehicle body, of a tail gate therefor, hinge connections of the gate with both the top and bottom of the body whereby the gate may be swung open from either the top or bottom arms pivotedly mounted on the body, paw s carried by the arms detachable connections of ,the gate with the upper hinge members, means for supporting the gate when 1n a lowered position, connections between the truck frame and the tail gate whereby the lowering t e body.

3. The combination of a vehicle body hav-.

the rear end, hangers ing standards upon a tail gate detachpivoted to the standards, ably connected to the hangers, hinge-connections of the gate to the body whereb the latter may be swung from the top an open at the bottom, arms plvotedly mounted on thebody pawls carried by the arms to engage and isengage the tall gate by the tilting of the body.

4. The combination with a vehicle body, of hangers pivoted to the body, a tail gate detachably connected to the hangers, hmge connections of the body and gate whereby the latter may be swung from the bottom, chains to support the gate when hmged at the bottom, arms pivotedly mounted on the body, awls carried by the arms to engage the tail gate connections between the truck frame and the arms whereby the latter are detachable operated to engage and-disengage the tail gate by the tilting of the body.

5. The combination of a truck frame, body tiltably mounted thereon, a tail gate hinged to the body, arms pivotedly mounted on the body, pawls carried by the arms to engage the tail gate, connections between the truck. frame and the arms whereby thelatter are operated to engage and disengage the tail gate by the tilting of the body,

6. The combination with a truck frame, a

body tiltably mounted thereon and having a tail gate hinged to the to' edge of the body, a rocker shaft mounte on the body, arms mounted on the shaft, pawls carried by the arms to engage the tail gate,'conncctions between the truck frame and the shaft whereby the latter and the arms are operated to engage and disengage the tail gate by the tilting of the body.

7. The combination with a truck frame, of a body tiltably mounted thereon, a tail gate, means for hingedly connecting either the top or bottom portion of the tail gate to the body, a rocker shaft mounted on the body, arms mounted on the shaft, pawls carried by the arms to engage the tail gate, connections between the truck frame. and the shaft whereby the latter and the arms are operated to en ge and disengage the tail gate by the tilting of the body.

8. The combination with a truck frame,

of a body tiltably mounted thereon and having hinge members secured to both the to and bottom of its rear end portion, a ta gate ha upper and lower coacting hinge sections a apted to register with the hinge shaft, pawls carried member secured to the body, means for hingedly connecting the hinge sections upon the tail gate with either the top or bottom hinge members of the body, a rocker shaft 9. The com ination with a truck frame,

of a body tiltably mounted thereon and having hinged members secured to both the top and bottom portions of the rear end of the body, a tail gate also having hinge portions at top and bottom and a apte to be detachably connected to either of said hinge members on the body, a chain one end of which is connected to the upper portion of the end of the body and the other end to the tail gate to support the same when hinged to the lower portion of the body and disconnected from the ton portion, mechanism attached to the body and fulcrumed from the fixed end of the chassis includin pawls to engage the lower end portion of t e tail gate when hinged at the top and in a manner to close the same when the body is being lowered in position upon the chassis.

Si ed at. Bridgeport, in the county of Fair eld and State of Connecticut this 18th day of July, A. D. 1919.

PHILIP CARLSON.

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